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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Way to know everything is alright with the breeding male
purpose of Breeding Soundness Exam (BSE) for males
seasonally polyestrous
monorchid
estrous
2. 1-2 days
accessory sex glands
reason for seasonal breeding periods
cowper's gland
ewe estrus
3. 4-6 days
mare estrus
van deferens
Hard
#1 cost in production
4. Milk is 15% ________ and 85% __________.
Dairy Cattle milking schedule
dry matter and water
normal presentation of the fetus
mare estrus
5. Front feet and head first. (except for hogs and dogs)
mare's estrous cycle
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
cow gestation
normal presentation of the fetus
6. 45-60 days after breeding; re-breed as required
pelvis
dairy cattle pregnancy check
cremaster muscle
scrotum
7. Days which have increasing daylight hours
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8. 24 hours before end of estrus cycle
mare ovulation
Lutinizing Hormone in males
Brown Swiss Cow
testis (gonads)
9. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
seminiferous tubules
seminiferous tubules
elastrator
estrous
10. 114 days
sow gestation
Follical Stimulating in females
prostate gland
mare's estrous cycle
11. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
mastitis
Sperm growth rate
growth lost from castration methods (knife & band)
pelvis
12. Can survive ~7 days in cow. vast majority <48 hours
semen evaluation (BSE)
cowper's gland
Sperm survival specs
seminiferous tubules
13. 283 days
retractor muscles
cow estrus
Jersey Cow
cow gestation
14. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
stag
feeding a high producing dairy cow
Mares
Sperm survival specs
15. Contains and regulates the temp of the testes for sperm production
purpose of Breeding Soundness Exam (BSE) for males
scrotum
dairy cattle pregnancy check
effects of estrogen
16. Important 'landmark' during palpation
urethra
prostate gland
cervix
mastitis
17. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract
what has to happen for males for copulation to occur
1. more cost effective - 2. powdered milk is in excess production
eminal vesicles
1. more cost effective - 2. powdered milk is in excess production
18. What about the sperm for a bull which has been castrated but still has testicles?
prostaglandin
uterus
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
oviducts
19. Sperm production
sigmoid flexure
spermatogenesis
mare ovulation
Dairy Cattle Gestation
20. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
Follical Stimulating in males
Mares
cryptorchid
Grading choice
21. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co
behavioral signs of estrus
effects of BST
visual evaluation (BSE)
vulva
22. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
cremaster muscle
penis proper
testosterone
mare estrus cycle
23. Parturition is controlled by...
Dairy Cattle milking schedule
dartos muscle
Hormones from both the fetus and the mom.
testosterone
24. 19-23 (21) days
epididymis: definition - 3 parts - 4 functions
penis proper
cow estrus cycle
feeding a high producing dairy cow
25. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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26. ~305 days (altough often longer due to breeding difficulties)
retractor muscles
sow gestation
Dairy Cattle Lactation (standard)
cow gestation
27. When are dairy cattle dehorned?
sperm cell
estrous
~1 month
Blood
28. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
Hard
Size of cow in relation to the amount of milk produced
ewe estrus cycle
Jersey Cow
29. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm
functions of progestrone
uterus
testis (gonads)
scrotal circumference (BSE)
30. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
Bull's fibro-elastic penis
epididymis: definition - 3 parts - 4 functions
Avg. bull specs
dartos muscle
31. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.
accessory sex glands
Hormones from both the fetus and the mom.
uterus
hormones
32. 1-3 days
Size of cow in relation to the amount of milk produced
van deferens
colostrum
sow estrus
33. What helps regulate spermatogenesis?
Reasons for gestation length being affected
dartos muscle
cow gestation
testosterone
34. (LH) causes female's egg to break (her period)
Lutinizing Hormone in females
reasons for castration
penis and prepuce observation (BSE)
sow estrus
35. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation
things to check for in a breeding soundness exam (BSE)
Where livelihood is in agriculture
effects of estrogen
Lutinizing Hormone in females
36. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
van deferens
rectal palpation (BSE)
seasonally polyestrous
Jersey Cow
37. Implies the amount of estrogen production
penis sizes vs delivering methods
femininity of a heifer
estrus
4 major reasons for culling dairy cows
38. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg
testosterone
hormones
sperm cell
mare gestation
39. Depository for semen during insemination. where urine leaves the body
vagina
semen evaluation (BSE)
cow estrus cycle
Parturition
40. FEED
cow estrus
1. more cost effective - 2. powdered milk is in excess production
~1 month
#1 cost in production
41. Allows extension of penis without fibro-elastic penis
sigmoid flexure
cremaster muscle
organs used in spermatogenesis
sow estrus cycle
42. Microscopic - make sure not sterile - very few bulls are actually tested
hypothalamus and pituitary gland
semen evaluation (BSE)
butterfat
sow estrus
43. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.
Culls bulls earlier (2 reasons)
eminal vesicles
Where livelihood is in agriculture
mare ovulation
44. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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45. Larger the cow - more milk is produced; smaller the cow - less milk is produced
growth lost from castration methods (knife & band)
ewe gestation
sertoli cells
Size of cow in relation to the amount of milk produced
46. 265-285 days
cervix
polyestrous
Dairy Cattle Gestation
van deferens
47. Depository for semen during insemination. where urine leaves the body
eminal vesicles
vagina
Blood
Holstein Cow
48. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.
dairy cattle pregnancy check
butterfat
behavioral signs of estrus
effects of estrogen
49. Duct through penis that carries sperm and urine
urethra
visual evaluation (BSE)
testis (gonads)
dry matter and water
50. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)
Grading choice
seasonally polyestrous
accessory sex glands
semen evaluation (BSE)